317878
Match the name of isomer in column I with the structure in column II and choose correct option. Column I Column II
1 \({\text{A - R, B - P, C - Q}}\)
2 \({\text{A - R, B - Q, C - P}}\)
3 \({\text{A - P, B - Q, C - R}}\)
4 \({\text{A - Q, B - P, C - R}}\)
Explanation:
Among the infinite number of conformations in the staggered conformation hydrogen atoms are as far as part as possible. While in eclipsed conformation hydrogen atoms are perfectly eclipsed. In skew conformation, hydrogen atoms are closer than in staggered but away than in eclipsed conformation. So, the option (1) is correct.
CHXI13:HYDROCARBONS
317879
How many of the following will show isomerism? Butane, propane, hexane, ethane, pentane, methane, octane.
1 3
2 5
3 1
4 4
Explanation:
The first three members of alkane family do not exhibit chain isomerism as chain branching is not possible.
CHXI13:HYDROCARBONS
317880
Dihedral angle of least stable conformer of ethane is :
1 \(180^{\circ}\)
2 \(60^{\circ}\)
3 \(0^{\circ}\)
4 \(120^{\circ}\)
Explanation:
Dihedral angle of least stable conformer (fully Eclipsed) is \(0^{\circ}\).
NEET - 2021
CHXI13:HYDROCARBONS
317881
Which one of the following conformations of ethane is more stable?
1 staggered
2 eclipsed
3 both are equally stable
4 skew
Explanation:
The half-chair can be attained by moving the carbons \(\mathrm{C}_{1}, \mathrm{C}_{2}, \mathrm{C}_{3}\) and \(\mathrm{C}_{4}\) of a chair, conformation into one plane and \(\mathrm{C}_{6}\) above the plane and \(\mathrm{C}_{5}\) below the plane. It contains many eclipsed carbon-hydrogen bonds. The half chair conformer lies about \(10.8\,\,{\text{kcal}}\) above the chair form.
317878
Match the name of isomer in column I with the structure in column II and choose correct option. Column I Column II
1 \({\text{A - R, B - P, C - Q}}\)
2 \({\text{A - R, B - Q, C - P}}\)
3 \({\text{A - P, B - Q, C - R}}\)
4 \({\text{A - Q, B - P, C - R}}\)
Explanation:
Among the infinite number of conformations in the staggered conformation hydrogen atoms are as far as part as possible. While in eclipsed conformation hydrogen atoms are perfectly eclipsed. In skew conformation, hydrogen atoms are closer than in staggered but away than in eclipsed conformation. So, the option (1) is correct.
CHXI13:HYDROCARBONS
317879
How many of the following will show isomerism? Butane, propane, hexane, ethane, pentane, methane, octane.
1 3
2 5
3 1
4 4
Explanation:
The first three members of alkane family do not exhibit chain isomerism as chain branching is not possible.
CHXI13:HYDROCARBONS
317880
Dihedral angle of least stable conformer of ethane is :
1 \(180^{\circ}\)
2 \(60^{\circ}\)
3 \(0^{\circ}\)
4 \(120^{\circ}\)
Explanation:
Dihedral angle of least stable conformer (fully Eclipsed) is \(0^{\circ}\).
NEET - 2021
CHXI13:HYDROCARBONS
317881
Which one of the following conformations of ethane is more stable?
1 staggered
2 eclipsed
3 both are equally stable
4 skew
Explanation:
The half-chair can be attained by moving the carbons \(\mathrm{C}_{1}, \mathrm{C}_{2}, \mathrm{C}_{3}\) and \(\mathrm{C}_{4}\) of a chair, conformation into one plane and \(\mathrm{C}_{6}\) above the plane and \(\mathrm{C}_{5}\) below the plane. It contains many eclipsed carbon-hydrogen bonds. The half chair conformer lies about \(10.8\,\,{\text{kcal}}\) above the chair form.
317878
Match the name of isomer in column I with the structure in column II and choose correct option. Column I Column II
1 \({\text{A - R, B - P, C - Q}}\)
2 \({\text{A - R, B - Q, C - P}}\)
3 \({\text{A - P, B - Q, C - R}}\)
4 \({\text{A - Q, B - P, C - R}}\)
Explanation:
Among the infinite number of conformations in the staggered conformation hydrogen atoms are as far as part as possible. While in eclipsed conformation hydrogen atoms are perfectly eclipsed. In skew conformation, hydrogen atoms are closer than in staggered but away than in eclipsed conformation. So, the option (1) is correct.
CHXI13:HYDROCARBONS
317879
How many of the following will show isomerism? Butane, propane, hexane, ethane, pentane, methane, octane.
1 3
2 5
3 1
4 4
Explanation:
The first three members of alkane family do not exhibit chain isomerism as chain branching is not possible.
CHXI13:HYDROCARBONS
317880
Dihedral angle of least stable conformer of ethane is :
1 \(180^{\circ}\)
2 \(60^{\circ}\)
3 \(0^{\circ}\)
4 \(120^{\circ}\)
Explanation:
Dihedral angle of least stable conformer (fully Eclipsed) is \(0^{\circ}\).
NEET - 2021
CHXI13:HYDROCARBONS
317881
Which one of the following conformations of ethane is more stable?
1 staggered
2 eclipsed
3 both are equally stable
4 skew
Explanation:
The half-chair can be attained by moving the carbons \(\mathrm{C}_{1}, \mathrm{C}_{2}, \mathrm{C}_{3}\) and \(\mathrm{C}_{4}\) of a chair, conformation into one plane and \(\mathrm{C}_{6}\) above the plane and \(\mathrm{C}_{5}\) below the plane. It contains many eclipsed carbon-hydrogen bonds. The half chair conformer lies about \(10.8\,\,{\text{kcal}}\) above the chair form.
317878
Match the name of isomer in column I with the structure in column II and choose correct option. Column I Column II
1 \({\text{A - R, B - P, C - Q}}\)
2 \({\text{A - R, B - Q, C - P}}\)
3 \({\text{A - P, B - Q, C - R}}\)
4 \({\text{A - Q, B - P, C - R}}\)
Explanation:
Among the infinite number of conformations in the staggered conformation hydrogen atoms are as far as part as possible. While in eclipsed conformation hydrogen atoms are perfectly eclipsed. In skew conformation, hydrogen atoms are closer than in staggered but away than in eclipsed conformation. So, the option (1) is correct.
CHXI13:HYDROCARBONS
317879
How many of the following will show isomerism? Butane, propane, hexane, ethane, pentane, methane, octane.
1 3
2 5
3 1
4 4
Explanation:
The first three members of alkane family do not exhibit chain isomerism as chain branching is not possible.
CHXI13:HYDROCARBONS
317880
Dihedral angle of least stable conformer of ethane is :
1 \(180^{\circ}\)
2 \(60^{\circ}\)
3 \(0^{\circ}\)
4 \(120^{\circ}\)
Explanation:
Dihedral angle of least stable conformer (fully Eclipsed) is \(0^{\circ}\).
NEET - 2021
CHXI13:HYDROCARBONS
317881
Which one of the following conformations of ethane is more stable?
1 staggered
2 eclipsed
3 both are equally stable
4 skew
Explanation:
The half-chair can be attained by moving the carbons \(\mathrm{C}_{1}, \mathrm{C}_{2}, \mathrm{C}_{3}\) and \(\mathrm{C}_{4}\) of a chair, conformation into one plane and \(\mathrm{C}_{6}\) above the plane and \(\mathrm{C}_{5}\) below the plane. It contains many eclipsed carbon-hydrogen bonds. The half chair conformer lies about \(10.8\,\,{\text{kcal}}\) above the chair form.
